Drier.



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No. 884,771. PATENTED APR. 14, 1908.

K. F. SNOW. DRIER.v

APPLICATION FILED APB.15. 1907.

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UNITED STATES PATENT OFFICE.

KARL F. SNOW, OF CLEVELAND, OHIO, ASSIGNOR TO THE C. O. BARTLETT & SNOW GO., OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

DRIER.

Application filed April 15, 1907.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, KARL F. SNOW, a citizen of the United States, resident of Cleveland, county of Cuyahoga, State of Ohio, have invented a new and useful Improvement in Driers, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My invention relates as indicated above, to driers, that is to devices designed for the desiccation or drying of materials.

The drier in hand is particularly designed for drying mineral materials, such, for instance, as pyrites and the like, although obviously its use is not limited to any particular kind of mineral.

The object of said invention is the provision of an improved pan or trough in which to conduct the drying operation as alsov the provision of a conveyer adapted not merely to advance material along such trough but to simultaneously turn it over and over and thus measurably facilitate the drying oper-v ation.

c To the accomplishment of above and related ends said invention consists of means hereinafter fully describedand particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention maybe used.

In said annexed drawings: Figure l is a vertical longitudinal cross section of a drier embodying my several improvements; Fig. 2 is a vertical transverse cross section of the same taken on the line 2 2 of Fig. 1 ;V Fig. 3 is a view partly in front elevation and partly in section of one of the flights constituting a feature of the improved conveyer above referred to; and Fig. 4 is a side elevation of such a flight. f

By reference to Figs. l and 2 of the drawings, it will be seen that my improved drier comprises essentially an elongated foundation A preferably constructed of brick in which is suitably mounted or supported a pan or trough B extending the entire length thereof. In such foundation A at one end is formed a furnace chamber A with the usual accessories of grate a, ash-pit c and doors a2 a3 for feeding fuel onto the grate and removal of ashes from the pit respectively. Likewise formed in said foundation A so as to extend practically the entire length thereof beneath trough B is a flue a4 that is connected a-t the farther end with a suitable stack a5. It will hence be seen that the heated gases arising from the furnace are adapted to maintain the pan or trough above at a suitable temperature for effecting the particular drying operation that maybe in hand. The pan B is preferably constructed of cast iron and to prevent leaking and also to allow for expansion and contraction, is constructed of sections l) that over-lap in the manner clearly indicated in Fig. 1.

To advance or move the material from the one end of trough B, in the figures shown as the right, to the other, the conveyer C is provided. Such conveyer comprises two endless sprocket chains, or cables, c respectively arranged along each side of said trough, passing around sprocket wheels c suitably mounted at each end of the latter. The upper laps of the chains are respectively supported on raised Ways cm consisting preferably of angle bars mounted and bent as shown in Fig. 1. Upon these ways the chains slidably rest and al sagging thereof is thus prevented. Atregular intervals said chains or cables are connected by transversely disposed bars c2, Fig. 2, and upon such bars are mounted s aced flights C2. Such flights are individualfy angularly adjustable about axes at substantially right angles to the bottom of said trough and are preferably arranged in the manner indicated in Figs. l and 2, that is alternate sets of the flights are oppositely inclined with respect to the direction of movement of the conveyer.A As a result of the adjustable feature, however, `just referred to, the angle at which they are thus inclined may be varied as occasion arises. This adjustability I secure by the following construction z-The base member c6 of each iiight has its upper face flanged so as to non-rotatably engage the bar c2 to which such flight is designed to be attached, the lower face of said base member being radially serrated. The scraper member c7 that constitutes the flight proper has a threaded stem c8 adapted to extend through said base member and the bar c2 and has a serrated face complementary to that of said base member. By means of a nut c threaded upon said stem cg it will accordingly be apparent that the scraper member can be securely locked in any angular position with respect to the base member by virtue of the engagement of the said serrated faces. When, however, it is desired to change such angular osition, this also is readily accomplished, for by merely loosening` the nut c until said faces are out of engagement, the flight can be rotated to such new position as desired. It is thus seen that the conveyer above described is adapted not merely to advance the material along the trough but simultaneously to stir it as well. This is accomplished by having the scraper flights spaced transversely and turned at an angle to the direction of movement of the conveyer. Alternate sets of the flights being oppositely inclined, the material, it will hence be seen, is shifted, laterally first in one direction, then in the other. Since the amount of stirring required will vary with different classes of materials, the usefulness of the adjustable feature in the mounting of the flights onto the conveyer will be evident. It has already been noted how that by constructing the trough of sections having their contiguous edges overlapping the necessary provision is made for contraction and expansion of the trough owing to temperature changes, without danger of leaking.

Other modes of a plying the principle of my invention may be employed instead of the one explained, change being made as ree gards the mechanism herein disclosed, vided the means stated by any one of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 1. In a drier, the combination of a trough, means for heating the same and an endless conveyer disposed to advance material along said trough, said conveyer comprising two endless cablesarranged one along each side of said trough, transverse bars connecting said cables at intervals, and spaced flights mounted upon said bars, said bars being provided on their under faces with means adapted to variously engage said flights to non-rotatably hold the-same and said flights being provided with means for securing the same to said bars irrespective of the axial position thus assumed.

2. In a drier, the combination of a trough, means for heating the same, and an endless conveyer disposed to advance material along said trough, said conveyer comprising two endless cables arranged one along each side of said trough, transverse bars connecting said cables at intervals, and spaced flights mounted upon said bars, each of said flights comprising a base member non-rotatably secured to the bar and having its lower face formed with projections, and a scraper member having a stem adapted to extend through said base member and the bar and be secured to the latter and a face formed with projections variously complementary to those of said base member.

3. In a drier, the combination of a trough, means for heating the same, and a conveyer disposed to advance material along said trough, said conveyer comprising two endless cables respectively arranged along each side of said trough, transverse bars connecting said cables at intervals, and spaced flights mounted upon said bars, each of said flights comprising a base member adapted non-rotatably to engage the bar and having its lower face serrated, and a scraper member having a stem adapted to extend through said base member and the bar and be secured to the latter and a serrated face complementary to that of said base member.

4. In a drier, the combination of a trough, means for heating the same, and a conveyer disposed to advance material along said trough, said conveyer comprising two endless cables respectively arranged along each side of said trough, transverse bars connecting said cables at intervals, and s aced flights mounted upon said bars, each of said flights comprising a base member having a flanged upper face adapted to non-rotatably engage the bar and a radially serrated lower face, a scraper member having a threaded stem adapted to extend through said base member.

and the bar and a serrated face complementary to that of said base member, and a nut on said threaded stem adapted to draw said members and the bar together.

5. A conveyer comprising two parallel end less cables, transverse bars connecting said cables at intervals, and spaced flights mounted upon said bars, each of said flights comprising a base member adapted non-rotatably to engage the bar and having its lower lace serrated, and a scraper member having a stem adapted to extend through said base member and the bar and be secured to the latter and a serrated face complementary to that of said base member.

6. A conveyer comprising two parallel endless cables, transverse bars connecting said cables at intervals, and spaced flights mounted upon said bars, each of said flights comprising a base member having a hanged upper face adapted to non-rotatably engage the bar and a radially serrated lower face, a scraper member having a threaded stem adapted to extend through said base member and the bar and a serrated face complementary to that of said base member, and a nut on said threaded stem adapted to draw said members and the bar together.

7. In a conveyer, the combination with a support, of a Hight mounted thereon, said flight comprising a base member non-rotatalower face formed with projections, and a scraper member having a stem adapted to extend through said base member and suport and be secured to the latter and a face 5 formed with projections variously complementary to those of said base member.

8. In a conveyor, the Combination With a bar support, of a flight mounted thereon, said flight comprising a base member havin a 10 hanged upper face adapted to non-rotatagbly engage the bar and a radially serrated lower face, a scraper member having a threaded' stem adapted to extend through said base member and the bar and a serrated face oomplementary to that of said base member, and 15 a nut on said threaded stem adapted to draw said members and the bar together.

Signed by me this 11th day of April 1907.

KARL F. SNOW. Attested by" D. D. DAVIEs, JNO. F. OBERLIN. 

